This paper presents the procedure for building Belgrade transport model as a tool for the optimization of Belgrade transport system development. City Council of Belgrade financed the Belgrade Transport Model (BeTraMod). It was a first experience of city government of Belgrade in developing huge data basis about transport system using software. This way defined model can be used by different users as official basis for calculations to respective authorities or local self-government organizations, whose activities are directly connected to planning, programming, management and building of transport system; basis of various research and scientific-research projects; basis for the appraisal process; basis for search of the optimal solutions of traffic regime; basis of intelligent transport systems in the portion of dynamic traffic control. Since BeTraMod is created it was already used for project documentation of three projects: pre-feasibility study and general project of lnner-city Ring Road, pre-feasibility study and general project of Light Rail Transport and feasibility study of Bypass road of Belgrade.